Bristle-pointing device



1,627,704 May 10, 1927. R IZAWA BHISTLE POINTING DEVICE Filed Dec. 29, 1925 PrT T RNE &

Patented May 10, 1927'.

UNITED STATES,

v r 1,627,704 PATENT OFFICE.

BIICHIBO IZAWA OI KYOTO, JAPAN.

BBISTLE-EOINTING DEVICE.

Application fled December 89, 1985, Serial No. 78,178, 1111 in Japan February 2, 1985.

This invention relates to a device for pointing bristles, the object of the invention uniformly bein to provide a simple and eflicient device of t is character by means of which the. bristles will be rapidly, economically and ointed. It is we known that brushes used by painters and paper hangers, to be efiiclent, must be provided with pointed bristles, as are also the best kinds of toothbrushes. Naturally pointed bristles, however, are not only very costly in themselves, but require considerable labor to arrange them properly with their pointed ends all in the same direction. Consequently, brushes made of such bristles are very expensive.

The object of the present invention, therefore, is to provide a device by means of which the bristles can be artificially pointed,

-. bent thereby making possible the production of cheaper brushes of excellent quality.

With the foregoing and other objects in View, the invention consists in the novel features of construction and combination of parts which will be more fully described hereinafter and particularly pointed out in the claims.

In the drawings accompanying and forming part of this specification- Fig. 1 is a side elevation of a device embodying the features of the present invention, and illustrating its operation;

Fig. 2 is a side view, on an enlarged scale, of a portion of said device;

Fig. 3 is a fragmentary cross-sectional view thereof; and

Fig. 4 is a fragmentary plan view.

The same characters of reference designate the same parts in, the different figures of the drawings.

Referring to the drawings, 1 designates a disk or wheel secured on a shaft 1?, which may be mounted for rotation in any suitable manner and may receive motion from any convenient source. Secured to the periphery of the .disk 1, is an annular member 3, which may be made of rubber or similar material, and in which are embedded the lower ends of a plurality of pins 2, which project radially from said member and are forward at an obtuse angle approximately at the center of their length, said pins being tapered toward their free ends. The surfaces of the pins are covered with a suitable abrading material, such as emery, powdered glass or the like, designated by the numeral 4. Said abrading material may be caused to adhere to the ins by first coating the latter --with a suitable cement and then sprinkling them with the abrading material. It is believed that the operation of the device will be understood from the foregoin description. The bunch of bristles 6 whic it is desired to oint are secured together in a suitable brus handle 5, as indicated in Fig. 1. It will readily be seen that by holding as indicated in said figure and causing the disk 1 to rotate in the direction of the arrow, the ins 2 will readily enter between the brist es and will thus abrade off their ends uniformly, thereby pointing them and rendering the tuft of bristles soft and pliable. When the bristles to be operated on are exceptionally thick and stiff, it is preferable to first steep them in a solution'of hydrogen fluoride and then wash them with sodium hyposulphite. This treatment will soften the bristles and the work of abradin them will thereby be considerably lightene I am aware that it has been attempted to point bristles by abrasion. In all of the devices with which I am familiar, however, the bristles have merely been held in contact with the flat surface of an abrading wheel. Consequently, not only was the pointing or taper imparted -to the bristles very short, but there was nothing to penetrate between the bristles, so that only those which were on the outsides of the brush or tuft received any a preciable abrasion, as a result of which rushes made from artificially pointed bristles were very much inferior in quality to those having naturally pointed bristles. With the device herein described, however,

the bent abrading pins readily enter be'-.

rotatable wheel, a plurality of pins extending radially from the periphery of said wheel, and an abrading material secured to the surfaces of said pins.

2. A bristle-pointing device, comprising a rotatable wheel, a plurality of pins extending radially from the periphery of said wheel, each of said pins having a portion the bristles in contact with the pins 2.

disposed at an angle to the remainder of the pins, and an abrading material secured to the surfaces of said pins.

3. A bristle-pointing device, comprising 5 a rotatable wheel, and a plurality of pins having abrasive surfaces extending radially from said wheel, said pins being tapered at their free ends.

4. A rotatable wheel, and a plurality of pins having abrasive surfaces extending radially from. said wheel, said pins bein bent approximately midway of their lengt in the direction of rotation of the wheel whereby the free end of each pin is disposed at an obtuse angle to the remainder of the 15 pins.

In testimony whereof I have name to this specification.

RIICHIRO IZAWA.

signed my 

